PermutationUnaryOperator (JavaPermutationTools - A Java library for computation on permutations)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface PermutationUnaryOperator
```
A functional interface for defining custom unary operators on Permutations. See the Permutation.apply(PermutationUnaryOperator) method.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void apply(int[] rawPermutation)
  Applies an operator on the raw representation of a Permutation.

- Method Detail
  - apply
```
void apply(int[] rawPermutation)
```
    Applies an operator on the raw representation of a Permutation. Implementers of this interface are responsible for ensuring that the apply method maintains a valid permutation of the integers in {0, 1, ..., rawPermutation.length - 1 }.
    
    Parameters:
    
    rawPermutation - A reference to the raw array of ints underlying a Permutation object. Changes to this array will directly change the Permutation object that encapsulates it.